%0 Journal Article
%T The effects of artificial aging on high translucent zirconia
%A Adrian Borhani
%A Klas Garbrielsson
%A Margareta Molin Thor¨¦n
%A Markus Carlborg
%A Wen Kou
%J Biomaterial Investigations in Dentistry
%D 2019
%R https://doi.org/10.1080/26415275.2019.1684201
%X Abstract Zirconia is known for its high strength but lacking translucency. Recently, a new type of high translucent zirconia, 5£¿mol% yttria partially stabilized zirconia (5Y-PSZ), with a larger fraction of cubic zirconia phase has become commercially available. However, the resistance to aging of these commercially available zirconia materials is not yet fully established. Purpose: The aim of the present study was to analyze the effects of artificial aging on surface roughness, transparency, phase transformation and biaxial flexural strength of two 5Y-PSZ products, DD cubeX2 and Prettau Anterior. Materials and methods: The artificial aging was performed in an autoclave under 2 bars of pressure at 134£¿¡ãC for 10£¿hours, which is estimated to correspond to 30¨C40£¿years in vivo. Artificial aging for 10£¿hours had no significant effect on surface roughness, transparency, or phase transformation for either of the tested materials. Results: DD cubeX2 had higher mean flexural strength than Prettau Anterior both before and after artificial aging for 10£¿hours (p£¿<£¿.05). DD cubeX2 showed, however, a significant reduction in flexural strength after artificial aging (p£¿<£¿.05), whereas Prettau Anterior showed a slight increase in flexural strength after artificial aging but not at a significant level. Conclusion: Within the limitation of the present study, both DD cubeX2 and Prettau Anterior seems to be relatively resistant to aging. However, a wider range of measured flexural strength indicated that Prettau Anterior probably is a less stable material than DD cubeX2, which also means that the flexural strength of DD cubeX2 could be more predictable
%U https://www.tandfonline.com/doi/full/10.1080/26415275.2019.1684201